Creating ssh key via sourceTree deactivates Save button

This is a bug report about a minor detail in the account settings dialog of SourceTree, where the save button is deactivated when actually needed.

Environment:
Mac OS X 10.13.6
SourceTree 2.7.6

What I did:

1. I create my account details in SourceTree. An old ssh key, [name]-Bitucket.pub, was automatically recognized.
2. I deleted that automatically recognized ssh key and all bitbucket-related savings in known-hosts, config, etc.
3. I went back to my account settings in Bitbucket, which now shows a warning triangle, because there is no ssh key found. (I call this, for the sake of reference, "pop-up window 1")
4. I click on "Create SSH key" (or whatever that button is called): a new window is opened - "pop-up window 2" - and offers to enter a password phrase. I enter the password phrase and click close. The "pop-up window 2" closes.

What I would expect:

Being back in pop-up window 1, I now expect to be able to click the save button in order to save my new settings.

What really happens:

The "Save" button is disabled, only cancel is possible.

Remark:

Since the SSH key was created and saved in the step with "pop-up window 2", and SourceTree recognized a generated SSH key automatically, it might be correct that my expectations of having an active save button available now - after adding an ssh key - are wrong, because everything is indeed saved as a click on "Cancel" and a re-opening of the account settings proves. However, it is misleading, since I just added a new configuration - the ssh key - to my settings...